a girl stands 1.5 m in front of a plane mirror, what is the distance of her image,and what are four image characteristics

Answer:

I don't know why you are asking me?

Answer:

periodic motion

Explanation:

The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.

Answer: the answer is storing properly in refrigeration.

Explanation:

The maximum magnetic field strength is 6.22 × 10⁻⁴ T. The result is obtained by dividing the maximum electric field strength by the speed of the wave.

The ratio of electric field strength to magnetic field strength in any electromagnetic wave is equal to the speed of light.

E/B = c

Where

If the speed of the medium wave is 0.75c and the maximum electric field strength is 140 kV/m. The maximum electric field strength would be

B = E/0.75c

B = 140.000/0.75c

B = 140.000/(0.75 × 3 × 10⁸)

B = 14×10⁻⁴/2.25

B = 6.22 × 10⁻⁴ T

Hence, the maximum electric field strength in the electromagnetic wave is 6.22 × 10⁻⁴ T.

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Answer:

Only at point a

Explanation:

If the velocity is greater than zero, than the object must be moving.

Answer:

\(\huge\boxed{\sf F=31.88 \ N}\)

Explanation:

Mass = m = 0.15 kg

Velocity = v = 17 m/s

Time = t = 0.08 s

Force = ?

\(\displaystyle F=\frac{mv}{t}\)

\(\displaystyle F=\frac{(0.15)(17)}{0.08} \\\\F=\frac{2.55}{0.08} \\\\F=31.88 \ N\\\\\rule[225]{225}{2}\)

Astronomers propose that the Milky Way galaxy contains a lot of dark matter because of the observed behavior of stars and other celestial objects within the galaxy.

One of the strongest pieces of evidence for dark matter in the Milky Way comes from the motion of stars in the outer regions of the galaxy. The visible matter in the Milky Way, such as stars and gas, cannot account for the observed gravitational forces that are holding these stars in their orbits. The only plausible explanation for this is the presence of a large amount of invisible, non-luminous matter, which we call dark matter.

Another piece of evidence for dark matter comes from the observation of gravitational lensing. This occurs when light from a distant object is bent or distorted by the gravity of a massive object that lies in front of it. Astronomers have observed gravitational lensing around the Milky Way and other galaxies, indicating the presence of a large amount of invisible matter that is distorting the light.

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Answer:

This description is likely referring to a graph that shows the velocity of a cart over time. The first part of the graph shows a positive slope, indicating that the velocity is increasing over time, and the second part of the graph shows a horizontal line, indicating that the velocity is constant. The fact that the slope of the first part of the graph is positive means that the cart is accelerating, since acceleration is defined as a change in velocity over time. The fact that the slope of the second part of the graph is zero means that the cart is not accelerating, since its velocity is not changing. The explanation suggests that the change in velocity is due to a fan being turned on and then off, which is causing the cart to accelerate and then move at a constant velocity.

When direct current flows through an electrical coil, it generates a magnetic field.

If the direct current flowing through the coil is increasing, the magnetic field strength will also increase.

This, in turn, will cause the coil to generate a stronger electromagnetic force, which can be used for various purposes such as powering motors, generating electricity, and more.

However, if the current flow becomes too strong, it can cause the coil to overheat and potentially damage it.

Therefore, it's important to ensure that the coil is designed to handle the amount of current flowing through it to prevent any potential damage.

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The type of circuit shown in the diagram is a closed series circuit. The Option C.

The circuit diagram illustrates a closed series circuit, where the components are connected in a series, forming a single loop. In a closed series circuit, the current flows through each component in sequence, meaning that the current passing through one component is the same as the current passing through the other components.

The flow of current is uninterrupted since the circuit forms a complete loop with no breaks or open paths. Therefore, the correct answer is a closed series circuit.

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Answer:

The Wavelength of the light would decrease from visible light into ultraviolet range A P E X

Explanation:

Classical physics predict that as the temperature is increased, the wavelength of the light would decrease from visible light into more energetic  ultraviolet range.

When an electric charge vibrates, an electromagnetic wave is produced.  Remember that heat is simply the kinetic energy of random motion. In a hot object, electrons vibrate in random directions and produce light as a result.

A hotter object produces more energetic vibrations, and thus emits more light —- it glows brighter. So far, so good. However, classical physics was unable to explain the shape of the blackbody spectrum.

As per the classical physics concepts, as the temperature increases, the wavelength of light becomes shorter and shifts to higher energy regions. Therefore, option A is correct.

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Answer:

the answer is solid.

Explanation:

solid particles have a definite volume and shape therefore they cannot move are they are whole. the particles of solid are closely packed together, barely move, and barely vibrate.

Answer:

Help with what

Explanation:

Answer:

= 24.76m

= 2476 cm

Explanation:

18 meters from point of origin = 18m north 90 degrees?

17 meters from point of origin = 17m west 0 degrees?

                                                                                                        _

If these routes are one after the other then we get a triangle  |

18 side and 17 side

This means we need to do Pythagoras Theorem.

18^2 + 17^2 = c^2

sqrt 324 + sqrt 289 =  c^2

c^2 = sqrt 613 = 24.7588368

= 24.76m

The star Betelgeuse is about 600 light-years away. If it explodes tonight, approximately: we won't know about it until 600 years from now.

Rather than measuring time, a light-year measures distance (as the name might imply). The distance a light beam travels in a single Earth year is measured in "light-years," which is roughly equivalent to 6 trillion miles (9.7 trillion kilometers).

Because the cosmos is expanding, the light that goes the farthest is stretched the most, resulting in the object that emitted that light being farther away. The expanding cosmos is the reason we can see things up to 46.1 billion light-years away. According to a common model of the Universe, some of the most recently discovered objects may be more than 13 billion light years away.

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The correct answer to the question is c) isothermal.

During an isothermal process applied to an ideal gas, there is no change in the internal energy of the gas. In an isothermal process, the temperature of the gas remains constant throughout the process. This means that the average kinetic energy of the gas molecules remains the same.

Since internal energy is directly related to the average kinetic energy of the gas molecules, when the temperature is constant, the internal energy also remains constant. This is because the increase in energy due to compression is balanced by the decrease in energy due to expansion, resulting in no net change in internal energy.

To illustrate this, let's consider an example of a gas confined in a cylinder with a movable piston. During an isothermal compression of the gas, work is done on the gas to decrease its volume. However, since the temperature remains constant, the gas molecules do not gain any additional kinetic energy. The work done on the gas is equal to the heat extracted from the gas, resulting in no change in the internal energy.

In contrast, during an isobaric process, the pressure of the gas remains constant while the volume may change. In an isochoric process, the volume remains constant while the pressure may change. In an adiabatic process, no heat is exchanged between the gas and its surroundings. In all these processes, there may be a change in the internal energy of the gas.

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Answer:

- maintain its state of motion

- Keep its velocity constant (either at zero or non-zero value)

Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

If Levi drove south for two hours and covered a distance of 160 kilometers, then his average speed for the entire trip was:

average speed = total distance / total time = 160 km / 2 h = 80 km/h

Let d(t) be the distance that Levi has driven at time t. Then we have:

d(0) = 0 (starting position)

d(2) = 160 km (final position)

d(1) = 80 km (distance traveled halfway through the trip)

The average speed between time t1 and t2 is given by:

average speed = (d(t2) - d(t1)) / (t2 - t1)

At time t=1, we have:

average speed = (d(2) - d(1)) / (2 - 1) = (160 km - 80 km) / 1 h = 80 km/h

This is consistent with the earlier calculation of the average speed for the entire trip.

The instantaneous speed at time t=1 is given by the derivative of the distance function with respect to time:

instantaneous speed = d'(1)

Using calculus, we can find:

d(t) = 40t^2

d'(t) = 80t

Therefore, the instantaneous speed at time t=1 is:

instantaneous speed = d'(1) = 80 km/h

So Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

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Answer: 1.2381 m/s

Explanation:

vf=vi + at

11.9 = 3.58 + a(6.72)

8.32 = a(6.72)

1.2381 m/s = a

Answer:

0.00176

Explanation:

Credit to the person above.

The probability of stopping at a traffic light is about 47.22%.

With 10 traffic lights, expect to be stopped for approximately 5 minutes and 45 seconds along the main street.

(a) To calculate the probability of stopping at a particular traffic light, we need to consider the cycle time of the traffic lights. The cycle time is the total time taken for one complete sequence of green, amber, and red signals. In this case, the cycle time is 55 + 17 + 48 = 120 seconds.

The probability of stopping at a particular traffic light can be calculated by dividing the red signal duration by the cycle time. Therefore, the probability is 48/120 = 0.4 or 40%.

However, in California, no one stops on amber, so we need to exclude the amber duration from the calculation. Therefore, the probability becomes 48/(55 + 48) ≈ 0.4722 or 47.22%.

(b) If there are 10 traffic lights on the main street, we can calculate the expected amount of time spent stopped at traffic lights by multiplying the probability of stopping at each traffic light by the average duration of being stopped.

The average duration of being stopped at a traffic light is the sum of the red signal duration and half of the amber signal duration. So, the average duration is (48 + 17/2) = 56.5 seconds. To find the expected amount of time stopped at traffic lights, we multiply the average duration by the number of traffic lights: 56.5 seconds * 10 = 565 seconds.

Therefore, if you drive all the way down the main street, the expected amount of time you are likely to be stopped at traffic lights is approximately 565 seconds, which is equivalent to 5 minutes and 45 seconds.

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The velocity of the object s calculated as 22.1 m/s.

Given that we can write that;

v^2 = u^2 + 2gh

Now u = 0 m/s because the object was dropped from a height

v^2 = 2gh

v = √2 * 9.8 * 25

v = 22.1 m/s

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Vector diagram B will result in the largest resultant vector. Correct option is B.

Vector is a mathematical quantity which has both magnitude as well as direction. Force, displacement, velocity & acceleration etc. are the examples of vectors. Vectors are denoted by a standard letter and an arrow upon it.

The resultant(R) of two vectors R1 and R2 having angle θ between them are given by,

R² = R₁² + R₂² + 2R₁R₂cosθ

A) in this diagram single vector is there,

so R = R₁

B) in this diagram two vectors are in same direction with zero angle between them. (Cos0 = 1)

R² = R₁² + R₂² + 2R₁R₂

C) & D) In these diagrams two vectors are in opposite direction with zero angle between them. (Cos180 = -1)

R² = R₁² + R₂² - 2R₁R₂

Looking at B Two vectors will be added each other and give largest resultant vector.

Hence Option B is correct.

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Answer:

Minimum uniform acceleration in Km/hr² is 20,505.05 km/hr²

Explanation:

In other to determine the acceleration, we can use the formula below

acceleration = velocity/time

Time wasn't given in the question, hence we calculate for time using the parameters given and the formula below

Velocity= distance/time

time = distance/velocity

distance = 2000m ⇔ 2km

time = 2/203

time = 0.0099

Hence, we look for acceleration

which is

acceleration = 203/0.0099

= 20,505.05 km/hr² ⇔ 2.0 × 10⁴

Answer:

Kinetic energy depends on mass and speed (or magnitude of velocity).

K.E.  = 1/2 M S² or The amount of kinetic energy of a moving object has dependence on its  mass and its velocity.

Explanation: They are both right for a certain question

The kinetic energy of a moving object depends on its mass and velocity. The higher the velocity higher will be the kinetic energy. Mass also have the similar effect.

Kinetic energy of an object is the energy generated by virtue of its motion. When particles of an  object acquire much energy to overcome the intermolecular force, they gain kinetic energy to move apart.

Kinetic energy is related to the mass and velocity of the moving object. The expression relating kinetic energy with these parameters is written below:

Ke = 1/2 mv².

As per the relation, the kinetic energy of an object increases with an increase in mass or velocity or both. Hence, massive objects with greater velocity is having greater kinetic energy.

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The hand that holds the broomstick's top when you sweep is its fulcrum. The hand in the top of the broom serves as the pivot point, making it a lever.

The majority of brooms have the fulcrum inserted into the bristles at the base of the brush. The user can apply a reasonable amount of force without the broom tipping over or becoming unstable because this location has a good balance of leverage and stability.

A lever is a straightforward device with a rigid bar or board that rotates around the fulcrum, a fixed point.

Lever, Pulley, Wheel and Axle, Inclined Plane, Wedge, and Screw are the six classical simple machines.

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Answer:

A: Balanced

B: Unbalanced

C: Balanced

D: Unbalanced

Explanation:

F =(frac{1}{4{pi}{varepsilon}_o}) x (frac {q_1q_2}{r^2})

F =(frac {5 {times} 10 {times} 8 {times} 10}{0.002 {times} 0.002}) x 9 x 10

F = 900N

Studying the magnetospheres of the Jovian planets has allowed us to measure their interior rotation rates. The correct option is B.

The magnetosphere is the region surrounding a planet where its magnetic field interacts with the solar wind, a stream of charged particles emitted by the Sun.

By analyzing the behavior of charged particles within the magnetosphere and their interactions with the planet's magnetic field, scientists can gain insights into the planet's internal dynamics, including its rotation rate.

Changes in the magnetic field and the motion of charged particles provide valuable data for determining the rotational characteristics of the Jovian planets.

This information helps scientists understand the complex dynamics and processes occurring within these giant planets.

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